Final answer:
The common difference of the arithmetic sequence -5, -7, -9, ... is -2.
Step-by-step explanation:
An arithmetic sequence is a sequence in which the difference between consecutive terms is constant. In this case, we are given the arithmetic sequence -5, -7, -9, ...
To find the common difference of an arithmetic sequence, we subtract any two consecutive terms. Let's subtract the second term from the first term to find the common difference:
-7 - (-5) = -7 + 5 = -2
So, the common difference of the arithmetic sequence -5, -7, -9, ... is -2.